* Solved* cannot post on forum module

Hello,
I am just setting up my first site with SS and have installed the forum module however I am having a problem posting topics.
Forums module has installed fine with no obvious errors.

I have logged in as site administrator and am trying to post a new topic but when I click on the "new topic"link I get taken back to the login page with the following message

"I'm sorry, but you can't post to this forum until you've logged in. If you want to log in as someone else, do so below. If you're logged in and you still can't post, you don't have the correct permissions to post."

I've still got this problem and I wish I could resolve it. I've tried updating to the latest SVN trunk version, but I still get the same issue. Even logging in as the administrator hitting the "start a new topic" link takes me to the log-in page and displays this message:

"I'm sorry, but you can't post to this forum until you've logged in. If you want to log in as someone else, do so below. If you're logged in and you still can't post, you don't have the correct permissions to post."